Adding new fields in WP Job Manager

I am using Listify theme and WP Job Manager Field Editor. I need to add new fields on my submit listing form. The problem is I want it to be dynamic. What I need is a dropdown with locations(which I was able to create) and a text box for a number next to it. This is for the installer to provide the number of installations done in any given location. Can this be done? Would appreciate any help. Thanks!